<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>初始vue</title>
    <script type="text/javascript"  src="../js/vue.js"></script>
</head>


<body>
    <div id="root">
        姓: <input  type="text" v-model="firstName"> <br/><br/>
        名: <input type="text" v-model="lastName"><br/><br/>
        全名:<span>{{fullName()}}</span>
    </div>
</body>


<script type="text/javascript">
   Vue.config.productionTip=false;
 
    let vm =new Vue({
        el:"#root",
        data:{
            firstName:"张",
            lastName:"三"
        },
        methods:{
            fullName(e){
               return this.firstName+"-"+this.lastName;
            }
        }
    })
</script>
</html>